Baseball power rankings (May 28, 2013)

Caption1. St. Louis Cardinals (Last week: 2)

Jayne Kamin-Oncea, USA TODAY Sports

They haven't lost a series in May, with a win over Clayton Kershaw on Sunday their latest achievement. Their pitching depth is being tested, but they still have Michael Wacha in the wings. That's impressive.

They haven't lost a series in May, with a win over Clayton Kershaw on Sunday their latest achievement. Their pitching depth is being tested, but they still have Michael Wacha in the wings. That's impressive. (Jayne Kamin-Oncea, USA TODAY Sports)